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https://www.readbyqxmd.com/read/28210432/biocompatibility-of-mineral-trioxide-aggregate-with-tio2-nanoparticles-on-human-gingival-fibroblasts
#1
Mohammad Samiei, Negin Ghasemi, Marzieh Aghazadeh, Baharak Divband, Farzaneh Akbarzadeh
BACKGROUND: The New compositions of white mineral trioxide aggregate (WMTA) or use of various additives like nanoparticles might affect MTA's ideal characteristics This study was performed to evaluate the cytotoxicity of WMTA and WMTA with Titanium dioxide (TiO2) nanoparticles (1% weight ratio) at different storage times after mixing on human gingival fibroblasts (HGFs). MATERIAL AND METHODS: HGFs were obtained from the attached gingiva of human premolars. HGFs were cultured in Dulbecco's Modified Eagle medium, supplemented with 10% fetal calf serum, penicillin and streptomycin...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28209150/penicillin-production-in-industrial-strain-penicillium-chrysogenum-p2niad18-is-not-dependent-on-the-copy-number-of-biosynthesis-genes
#2
Sandra Ziemons, Katerina Koutsantas, Kordula Becker, Tim Dahlmann, Ulrich Kück
BACKGROUND: Multi-copy gene integration into microbial genomes is a conventional tool for obtaining improved gene expression. For Penicillium chrysogenum, the fungal producer of the beta-lactam antibiotic penicillin, many production strains carry multiple copies of the penicillin biosynthesis gene cluster. This discovery led to the generally accepted view that high penicillin titers are the result of multiple copies of penicillin genes. Here we investigated strain P2niaD18, a production line that carries only two copies of the penicillin gene cluster...
February 16, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28208879/carbamazepine-induced-life-threatening-stevens-johnson-syndrome-and-agranulocytosis-the-maiden-case
#3
A Avinash, V Mohanbabu Amberkar, Sushil Kiran Kunder, Sharath Madhyastha, K Meenakumari
Stevens-Johnson syndrome is one of the few dermatological emergencies in clinical practice. The syndrome is often secondary to the usage of drugs, of which allopurinol, penicillins, sulfa drugs, ibuprofen, sodium valproate, phenytoin, lamotrigine and carbamazepine are commonly implicated. Agranulocytosis is the existence of a clinically significant reduction in neutrophil count. This condition is a serious threat to the patient, as he/she is at a greater risk of contracting bacterial or fungal infections, which may prove to be fatal...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208218/antibiotic-resistance-in-escherichia-coli-in-husbandry-animals-the-african-perspective
#4
REVIEW
Carla Andrea Alonso, Myriam Zarazaga, Rym Ben Sallem, Ahlem Jouini, Karim Ben Slama, Carmen Torres
In the last years different surveillances have been published in Africa, especially in Northern countries, regarding antimicrobial resistance among husbandry animals. Information is still scarce, but the available data shows a worrying picture. Although the highest resistance rates have been described against tetracycline, penicillins and sulphonamides, prevalence of plasmid mediated quinolone resistance genes and extended-spectrum β-lactamase (ESBL) are being increasingly reported. Among ESBLs, the CTX-M-1 group was dominant in most African surveys, being CTX-M-15 the main variant both in animals and humans, except in Tunisia where CTX-M-1 was more frequently detected among E...
February 16, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28207768/prevalence-of-mdr-pathogens-of-bacterial-meningitis-in-egypt-and-new-synergistic-antibiotic-combinations
#5
Mona M Abdelkader, Khaled M Aboshanab, Marwa A El-Ashry, Mohammad M Aboulwafa
The aim of this study was identifying bacterial pathogens involved in meningitis, studying their antibiotic resistance profiles, investigating the antibiotic resistance genes as well as evaluating the use of various antibiotic combinations. Antibiotic susceptibility tests were evaluated according to CLSI guidelines. Antibiotic combinations were evaluated by calculating the Fractional Inhibitory Concentration (FIC) index. A total of 71 bacterial isolates were recovered from 68 culture positive CSF specimens...
2017: PloS One
https://www.readbyqxmd.com/read/28206705/erysipelothrix-rhusiopathiae-bloodstream-infection-a-22-year-experience-at-mayo-clinic-minnesota
#6
E M Tan, J R Marcelin, N Adeel, R J Lewis, M J Enzler, P K Tosh
Erysipelothrix rhusiopathiae is a facultatively anaerobic Gram-positive bacillus found mostly in swine, fish and sheep. E. rhusiopathiae classically causes cutaneous eruptions in butchers, fish handlers and veterinarians. Based solely on case reports, 90% of E. rhusiopathiae bloodstream infections (BSI) have been associated with infective endocarditis (IE). To assess the true frequency of IE in E. rhusiopathiae BSI as well as other clinical associations, we performed a retrospective cohort analysis of E...
February 16, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28205436/comparison-of-lateral-flow-assay-kidney-inhibition-swab-and-liquid-chromatography-tandem-mass-spectrometry-for-the-detection-of-penicillin-g-residues-in-sow-urine
#7
Weilin L Shelver, Shubhashis Chakrabarty, David J Smith
Sows (n = 126) were administered penicillin G; urine, collected at slaughter, was screened by kidney inhibition swab (KIS; 4 h testing time) and then stored at -80 °C (∼1200 days) until analysis by lateral flow assay (LF, ∼5 min testing time) and tandem quadrupole LC-MS/MS (TQ) analysis. The stability of penicillin in urine during storage was verified using TQ analyses. Quantitative results were well-correlated (R(2) = 0.98) with only a ∼10% decrease in penicillin concentration during the 3-year storage period...
February 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28200045/single-dose-versus-3-doses-of-intramuscular-benzathine-penicillin-for-early-syphilis-in-hiv-a-randomized-clinical-trial
#8
Roberto Andrade, Maria C Rodriguez-Barradas, Kosuke Yasukawa, Erick Villarreal, Michael Ross, Jose A Serpa
No abstract text is available yet for this article.
February 14, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28197643/machine-learning-principles-can-improve-hip-fracture-prediction
#9
Christian Kruse, Pia Eiken, Peter Vestergaard
Apply machine learning principles to predict hip fractures and estimate predictor importance in Dual-energy X-ray absorptiometry (DXA)-scanned men and women. Dual-energy X-ray absorptiometry data from two Danish regions between 1996 and 2006 were combined with national Danish patient data to comprise 4722 women and 717 men with 5 years of follow-up time (original cohort n = 6606 men and women). Twenty-four statistical models were built on 75% of data points through k-5, 5-repeat cross-validation, and then validated on the remaining 25% of data points to calculate area under the curve (AUC) and calibrate probability estimates...
February 14, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28196838/screening-for-asymptomatic-neurosyphilis-in-hiv-patients-after-treatment-of-early-syphilis-an-observational-study
#10
Andrew Tomkins, Shazaad Ahmad, Darren E Cousins, Caroline M Thng, Francisco Javier Vilar, Stephen P Higgins
OBJECTIVE: To determine the prevalence of asymptomatic neurosyphilis (ANS) in HIV-positive individuals after treatment of early syphilis with single-dose benzathine penicillin G (BPG) or oral antibiotic alternatives. METHODS: Patients at high risk of neurosyphilis (defined by serum rapid plasma reagin (RPR) titre ≥1:32 and/or peripheral blood CD4 lymphocyte count ≤350/μL) underwent lumbar puncture (LP) at a median time of 8.2 months post treatment. ANS was diagnosed by a reactive cerebrospinal fluid (CSF) RPR test or CSF white blood cells (WBC) >20/μL plus a reactive CSF Treponema pallidum particle agglutination (TPPA) ≥1:640...
February 14, 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28193660/antimicrobial-resistance-of-escherichia-coli-urinary-isolates-in-the-veterans-affairs-healthcare-system
#11
Haley J Morrill, Jacob B Morton, Aisling R Caffrey, Lan Jiang, David Dosa, Leonard A Mermel, Kerry L LaPlante
We reviewed almost 300,000 clinical E. coli urine isolates (2009-2013) from 127 facilities to assess antibiotic resistance among Veterans Affairs healthcare system patients using Clinical Laboratory Standards Institute and Centers for Disease Control and Prevention National Healthcare Safety Network definitions/guidance. Resistance to fluoroquinolones and trimethoprim/sulfamethoxazole approached 30%. Resistance to nitrofurantoin, anti-pseudomonal penicillin/beta-lactamase inhibitors, and carbapenems remained less than 10%...
February 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28193649/pbp2x-in-streptococcus-pseudopneumoniae-an-insight-into-the-diversity-of-pbp2x-alleles-and-mutations-in-viridans-streptococci
#12
Mark van der Linden, Julia Otten, Carina Bergmann, Cristina Latorre, Josefina Liñares, Regine Hakenbeck
Speciation of commensal streptococci is an everlasting problem due to their ability for genetic transformation. A new challenge in this respect is the recently described S. pseudopneumoniae as a new species, distinguished from closely related pathogenic S. pneumoniae and commensal S. mitis by a variety of physiological and molecular biological tests. Fortyone atypical S. pneumoniae have been collected at the National Reference Center for Streptococci (NRSG) in Germany. MLST analysis confirmed the species S...
February 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28193184/survey-of-spanish-general-practitioners-attitudes-toward-management-of-sore-throat-an-internet-based-questionnaire-study
#13
Carl Llor, Isabel Vilaseca, Eduardo Lehrer-Coriat, Xavier Boleda, José L Cañada, Ana Moragas, Josep M Cots
BACKGROUND: The management of sore throat varies widely in Europe. The objective of this study was to gain insight into clinicians' perceptions on the current management of sore throat in Spain. METHODS: Cross-sectional, internet-based questionnaire study answered from July to September 2013. General practitioners (GPs) affiliated with the two largest scientific societies of primary care were invited to participate in the study. Questions were asked about physician knowledge, the use of current national guidelines for sore throat management, and management in two clinical scenarios, depicting a young adult with sore throat and: 1...
February 14, 2017: BMC Family Practice
https://www.readbyqxmd.com/read/28192644/perioperative-antibiotics-for-prevention-of-acute-endophthalmitis-after-cataract-surgery
#14
REVIEW
Emily W Gower, Kristina Lindsley, Samantha E Tulenko, Afshan A Nanji, Ilya Leyngold, Peter J McDonnell
BACKGROUND: Endophthalmitis is a severe inflammation of the anterior or posterior (or both) chambers of the eye that may be sterile or associated with infection. It is a potentially vision-threatening complication of cataract surgery. Prophylactic measures for endophthalmitis are targeted against various sources of infection. OBJECTIVES: To evaluate the effects of perioperative antibiotic prophylaxis for endophthalmitis following cataract surgery compared with no prophylaxis or other form of prophylaxis...
February 13, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28185856/exposure-to-%C3%AE-lactams-results-in-the-alteration-of-penicillin-binding-proteins-in-clostridium-perfringens
#15
Miseon Park, Fatemeh Rafii
Clostridium perfringens causes a variety of mild to severe infections in humans and other animals. A decrease in the affinity of penicillin-binding protein (PBP) transpeptidases for β-lactams is considered one of the mechanisms of β-lactam resistance in bacteria. Two strains of C. perfringens isolated from bovines and one isolated from a chicken, which had decreased susceptibility to β-lactams, had variations in the amino acid sequences of the central penicillin-binding regions of the PBPs. β-Lactam-resistant mutants of another C...
February 6, 2017: Anaerobe
https://www.readbyqxmd.com/read/28185714/choosing-wisely-the-top-5-recommendations-from-the-italian-panel-of-the-national-guidelines-for-the-management-of-acute-pharyngitis-in-children
#16
Elena Chiappini, Barbara Bortone, Giuseppe Di Mauro, Susanna Esposito, Luisa Galli, Massimo Landi, Andrea Novelli, Paola Marchisio, Gian Luigi Marseglia, Nicola Principi, Maurizio de Martino
PURPOSE: With the aim to reduce waste in the health care system and avoid risks associated with unnecessary treatment, the Italian Panel of the National Guidelines for the Management of Acute Pharyngitis in Children joined the Choosing Wisely initiative. METHODS: An ad hoc Choosing Wisely task force was selected to develop a candidate list of items for the top-5 list on pharyngitis medicine. Through a process of literature review and consensus, the final list of 5 items was chosen...
February 6, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28185399/molecular-recognition-and-binding-of-beta-lactamase-ii-from-bacillus-cereus-with-penicillin-v-and-sulbactam-by-spectroscopic-analysis-in-combination-with-docking-simulation
#17
Yeli Zhang, Pan Qiao, Shuaihua Li, Xuan Feng, Liujiao Bian
The molecular recognition and binding interaction of beta-lactamase II from Bacillus cereus (Bc II) with penicillin V (PV) and sulbactam (Sul) at 277 K were studied by spectroscopic analysis and molecular docking. The results showed that a non-fluorescence static complex was separately formed between Bc II and two ligands, the molecular ratio of Bc II to PV or Sul was both 1:1 in the binding and the binding constants were 2.00 × 10(6) and 3.98 × 10(5) (L/mol), respectively. The negative free energy changes and apparent activation energies indicated that both the binding processes were spontaneous...
February 10, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28185274/clarithromycin-trimethoprim-and-penicillin-and-oxidative-nucleic-acid-modifications-in-humans-randomised-controlled-trials
#18
Emil List Larsen, Vanja Cejvanovic, Laura Kofoed Kjaer, Morten Thorup Pedersen, Sara Daugaard Popik, Lina Kallehave Hansen, Jon Traerup Andersen, Espen Jimenez-Solem, Kasper Broedbaek, Morten Petersen, Allan Weimann, Trine Henriksen, Jens Lykkesfeldt, Christian Torp-Pedersen, Henrik Enghusen Poulsen
AIMS: In vitro studies have demonstrated that formation of reactive oxygen species (ROS) contributes to the effect of bactericidal antibiotics. The formation of ROS is not restricted to bacteria, but also occurs in mammalian cells. Oxidative stress is linked to several diseases. This study investigates whether antibiotic drugs induce oxidative stress in healthy humans as a possible mechanism for adverse reactions to the antibiotic drugs. METHODS: This study contains information from two randomised, controlled trials...
February 10, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28183731/c-septicum-complicating-hemolytic-uremic-syndrome-survival-without-surgical-intervention
#19
Rachel M Engen, Elizabeth Y Killien, Jessica L Davis, Jordan M Symons, Silvia M Hartmann
Clostridium septicum is an anaerobic bacterium that causes rapidly progressive myonecrosis, bacteremia, and central nervous system infection. It has been reported as a complication of Escherichia coli hemolytic uremic syndrome (HUS) in 8 children worldwide; 5 children died, and the 3 reported survivors had surgically treated disease. We present 3 cases of C septicum complicating HUS in children, including the first 2 reported cases of survival without surgical intervention. All patients presented with classic cases of HUS with initial clinical improvement followed by deterioration...
February 9, 2017: Pediatrics
https://www.readbyqxmd.com/read/28183008/potentiometric-uv-and-1-h-nmr-study-on-the-interaction-of-penicillin-derivatives-with-zn-ii-in-aqueous-solution
#20
Paola Cardiano, Rosalia Maria Cigala, Francesco Crea, Concetta De Stefano, Ottavia Giuffrè, Silvio Sammartano, Giuseppina Vianelli
The interaction of Zn(II) with ampicillin [(2S,5R,6R)-6-([(2R)-2-amino-2-phenylacetyl]amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2- carboxylic acid] and amoxicillin [(2S,5R,6R)-6-{[(2R)-2-amino-2-(4-hydroxyphenyl)-acetyl]amino}-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-24-carboxylic acid] in NaCl aqueous solution at different ionic strengths and at t=25°C was investigated by potentiometric, UV and (1)H NMR techniques. Fairly similar speciation models were obtained for the two systems...
January 31, 2017: Biophysical Chemistry
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